Record changing phonograph



J S ZANDELIN RECORD CHANGING PHONOGRAPH Flled June 5, 1947 June 9, 1953 Patented June 9, 1953 RECORD CHANGING PHoNoGRAPn Johan Samuel Zandelin, Stockholm, Sweden, as- I signor to Industriaktiebolaget Luxor, Motala, Sweden, a corporation of Sweden Application June 5, 1947, Serial No. 752,739 In Sweden December 8, 1945 Section 1, Public Law 690, August 8, 1946 Patent expires December 8, 1965 2 claims. (C1. 274-10) The present Invention relates to phonographs providedwith a record changing mechanism of the type in which a stationary post extends' upwards from the centre of the turntable and has an olset upper portion so as to form at the base of said oiset portion a shoulder for supporting a pile of records of which the lowermost one may be moved laterally into concentric 'relation with the post by a record displacing member and thereby released so as to fall on to the turntable.

In the operation of the known mechanisms of this kind disturbing noise is produced as a consequence thereof that when the record feeding member has moved the lowermost record into concentric relationwith the stationary post this record is pushed downwards under the weight of thel remainder of the pile which imparts a high initial velocity to the same so that it strikes rather violently against the turntable.

It is an object of the present invention to eliminate this drawback.

Other objects of the invention will become apparent from the following description of a preferred embodimentv thereof, reference being had to the accompanying drawing in which Figs. l to are side elevations partly in section of the mechanism showing the same in different positions during the record changing cycle.

In the drawing I denotes a central stationary post extending upwards from the centre of the turntable (not shown) and having an offset upper portion 2. At the upper end of the post I a shoulder 3 is formed which is adapted to support a pile of records 4, the distance between this shoulder and the lower end 5 of the offset portion 2 being suiiicient to permit the lowermost record 6 of the pile to be moved laterally into concentric relation 'with the post I, The post I has a longitudinal slot in which a rodshaped record displacing or feeding member 1 is rotatably mounted on a transverse pin 8 which extends through an elongated aperture 9 in the displacing member 1 so that this member may also be moved in a vertical direction in the post I. At its upper end the rod-shaped member 1 has a projection I2 at the base of which a supporting shoulder II is formed.

The lower end of the record feeding member 1 projects downwards from lower end of the post I and is formed with a ball-shaped end piece II] adapted to engage a peripheral cam groove I3 provided in a rotatably mounted roll I4. The cam groove I3 follows a particular curve in axial direction and the depth of the same Ivaries in peripheral direction. The roll I4 is adapted to be rotated once durin' each record changing operation in the direction of the arrow" I5 by a suitable mechanism. This rotation of the roll I4 causes the recordfeeding member 1 engaging the cam groove I 3 to be moved as described hereinafter. f

Fig. l shows the starting .position when a change of records isv` to ltake place. Inthis position thev pile 4 rests'l on the shoulderl 3 of the post I. When the roll vI4 is caused to rotate in the direction of the' arrow I5 the record feeding member 1 isrst moved upwards so that the pile 4 afterhaving been engaged by the shoulder I I of the member 1 is raised from the shoulder 3 of the post I, as shown in Fig. 2. a Then the record feeding member 1 is swung clockwise about the pin 8 moving the lowermost record 6 to the right into concentric relation withA the central post I, as illustrated in Fig. 3. Next the record feeding member 1 is lowered so that the pile 4 is gently placed upon the shoulder:3 of the post I while the record 6 is further lowered and separated somewhat from the pile 4 (Fig. 4),. The record 6,is now free from the rWeight of the pile and is supported by the shoulder II of the record feeding member 1. Now this member 1 is swung counter-clockwise into concentric relation with the central post I thereby causing the shoulder II to release the record 6 so that this record falls gently and without disturbing noise on to the turntable. The upward movement of the record feeding member 1v from the position shown in Fig. 5 to that shown in Fig. 1 may be effected immediately after said member has reached the first-mentioned position or, if desired, at the beginning of a new record changing operation in :which latter case the'position shown in Fig. 5 would be the starting position. As will be vseen from the drawing the only frictional wear on the records will be that which occurs when the lowermost record is moved laterally from the position shown in Fig. 2 to that shown in Fig. 3 and slides with its upper surface against the lower surface of record above the same, and when the shoulder II of the record feeding member 1 is retracted from its supporting position in Fig. 4. In the latter case, however, the record 6 has been separated from the remainder of the pile so that the friction will be rather small.

According to a modification the record feeding member 1 may be only rotatably connected to the central post I in a position corresponding tc that shown in Fig. l, so that when the record feeding member is swung clockwise the lowermost record 6 is displaced laterally into concentric It is obvious that other variations may be made in the embodiment above described without defparting from the scope of the invention as Vdefined by the following claims.

What I claim is:

1. In a record changing phonograph, a sta-l tionary post having an offset upper portion to provide a shoulder for temporarily supporting a pile of records of which the lowermost record may be displaced laterally into concentric rela,s tion with the post, a record displacing member swingably mounted on a transverse pivot i'nsaid stationary post and alsomovable in longitudinal direction, said' record; displacing member being provided at its upper end with a projecf tion ladapted, normally to .engage the central hole of; the lowarmostreoord of the pile and with a'. shoulder `arranged .atv `the .base of said prog `jection substantially at a level with the shoule der of the post. when the displacing member is in its upper position, for temporarily supporting the pile of records when the displacingv member is'swung to a position in which said shoulder is outside the periphery of said stationary post, and a driving mechanism for said displacing member, saiddriving mechanism being adapted first to swing the .record displacing. member in a directinn for moving the lowermost .record oi the pile intotconcentric relation with the post, then to lower the record .displacing member so as to separate the `lovverniosi, record from the remainder 'ofthe -pile and piace 'the latter upon the shoulder -of the post, thento swing the racer-d displacing `member back so asto .release the record supported by .the Ysame .and allow said record to* descend along the post, 4and finally to raise thereoord :displacing member so as-to cause the upper projection thereof to engage the central hole of 'the next record-of the pile.

2. In a record changing mechanism, a stationary post having an offset upper portion to provide a shoulder for temporarily supporting a pile of records Q .f which .the lowering-St record maybe displaced laterally into concentric relation with said post, a record displacing member swingably mounted on a transverse pivot in said post and also in longitudinal direction with respectto the same, said record displacing member being provided at its upper end with a projection and with a'v shoulder at the base of said piQjQ'Qion "for temporarily supporting the pile of'recorda'when'the displacing member is swung to 'a positionfinwhich said shoulder is outside 'the periphery of said stationary post, and a driving mechanism for said record displacing member, said driving mechanism being adapted rst to move the record displacing member upwards se as to cause the shoulder thereon to engage the pile of records and raise the same from the sheulizier ci the Pest., then ic swine, said record disclaims member in a V`direction `for moving the lower-most; record of, the pile into ccncenriorela tion with the nest, then to levier the record disf placing member so. as to Seperate the lowermcst record-from the remainder ,of the pile .and place the latter upon the shoulder of theme11., and finally to swine the record displacing member baci; so as te release the recare supported hr the same and allow. saidreecrd todescend 'alone said post.

JOI-IAN SAMUELZANDELIN.

References Cited the file of this patent Unirse ermee 'minare Denmark Dec. 17, 1945 

